文献类型：期刊文献

英文题名：Synergistic co-pyrolysis of phosphogypsum and sewage sludge for phosphorus recovery: a novel multi-pollutant control and resource utilization strategy

作者：Li, Jing Chen, JingJing Huang, Haiming Chen, Xingtong Xiao, Dean Huang, Suran Li, Yongyun

第一作者：Li, Jing

机构：[1] School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China; [2] School of Resources and Environmental Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China

通信机构：School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan, 523808, China

年份：2025

卷号：515

外文期刊名：Chemical Engineering Journal

收录：EI(收录号：20252018446535);Scopus(收录号：2-s2.0-105005204661)

语种：英文

外文关键词：Bioremediation - Cracking (chemical) - Debris - Recycling - Refuse disposal - Sludge disposal - Wastewater disposal - Water pollution control

摘要：Co-managing wastewater and solid waste contributes to reducing pollutant emissions and promoting resource reutilization. Sewage sludge (SS) and phosphogypsum (PG) are widely produced solid wastes with complex compositions and environmental risks but also significant resource potential. This study utilized a co-pyrolysis product of SS and PG to recover phosphorus (P) from wastewater, with the P-saturated product repurposed as a soil fertilizer. Co-pyrolysis reduced P leaching by converting the soluble P in PG into stable crystalline forms, and decreased fluorine (F) leaching primarily through physical adsorption. The strong acidity of PG was neutralized by basic functional groups in SS biochar. The resulting material effectively removed P via ligand exchange and surface precipitation, with CaSO4 formed on its surface serving as the adsorption site. It exhibited a maximum adsorption capacity of 30.21 mg P/g, performed optimally within a pH range of 7–9, and showed high resistance to competing anions. The P-saturated adsorbent significantly enhanced maize growth at an optimal dosage of 1.0 wt%. This method achieves P removal and recovery, and provides a sustainable solution for the safe disposal and reuse of SS and PG. However, the increased reactivity of Cu and Zn in SS after co-pyrolysis requires further investigation. ? 2025 Elsevier B.V.